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<h1>pwvpe
&nbsp;&nbsp;<img src="../mex.png" alt="Linux PC" border="0" title="Linux PC"></h1>

<h2><a name="_name"></a>PURPOSE <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
<div class="box"><strong>Peak of polynomial Wigner-Ville frequency estimation</strong></div>

<h2><a name="_description"></a>DESCRIPTION <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
<div class="fragment"><pre class="comment"> Peak of polynomial Wigner-Ville frequency estimation

 Estimates the instantaneous frequency of the input signal by
 extracting the peaks of the sixth order kernel polynomial
 Wigner-Ville distribution.


 Usage:

     ife = pwvpe( signal, lag_window_length, time_res, interpol [, fft_length] ))


 Parameters:

    signal

         Input one dimensional signal to be analysed. An analytic signal
      is required for this function, howver, if signal is real, a
      default analytic transformer routine will be called from this
      function before computing tfd.

    lag_window_length

      The size of the kernel used for analysis. window_length must be
      odd. The kernel used will be defined from -(lag_window_length+1)/2 to
      +(lag_window_length+1)/2 in both time and lag dimensions.

    time_res

      The number of time samples to skip between successive slices of
      the analysis.

    interpol

      The number of interpolating the input signal in time domain to get
      the proper time fractional time lags required to compute the sixth
         order kernel.

    fft_length

         Zero-padding at the fft stage of the analysis may be specified by
         giving an fft_length larger than normal. If fft_length is not
         specified, or is smaller than the lag_window_length, then the
         next highest power of two above lag_window_length is used. If
         fft_length is not a power of two, the next highest power of two is
      used.



  See Also: <a href="pwvd4.html" class="code" title="">pwvd4</a>, <a href="pwvd6.html" class="code" title="">pwvd6</a></pre></div>

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